THWART

THWART

"My plan has been thwarted!" After I said it, I realized I don't use this word very often. As I thought about it, I felt like I was speaking in Shakespearian language. Then I observed how the word feels in the mouth while you're saying it. 

The word comes from the Middle English word "thwerten" which means to oppose or be at odds with - or to lie across something, thus interrupting it. (source)

That brings up a question about Middle English. According to the History of English website, the Norman Conquest in 1066 precipitated the transition from Old English to Middle English. We're now in the Modern English time period according to these people. 

I feel words like "dastardly" and "egads" go with thwart.